Door lock



FIG. 1 is a front view of a door lock showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a perspective view thereof; and,

FIG. 7 is a rear view thereof. 

The ornamental design for a door lock, as shown and described. 